Hykilpikonna
137 lines
2.9 KiB
TypeScript
137 lines
2.9 KiB
TypeScript
/* eslint-disable prefer-const */
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/**
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* Regex used in markdown extension parsing
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*/
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const re = {
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command: /<!--{.*?}-->/g,
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hashes: /^#+/g,
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}
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declare global
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{
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interface RegExp
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{
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find(s: string): RegExpExecArray | null;
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}
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}
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/**
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* Make sure that regex find is consistent
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* https://stackoverflow.com/questions/11477415/why-does-javascripts-regex-exec-not-always-return-the-same-value
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*/
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RegExp.prototype.find = function(s)
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{
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const r = this.exec(s)
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this.lastIndex = 0
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return r
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}
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/**
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* Parse markdown extensions
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*
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* @param raw Extended markdown
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* @return Parsed markdown
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*/
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export function parseExtensions(raw: string): string
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{
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// @ts-ignore
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let lines = raw.replace('\r\n', '\n').split('\n')
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let i = 0
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/**
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* Find the end index of a section or -1
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*/
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function findSectionEnd(): number
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{
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const r = re.hashes.find(lines[i])
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if (!r) return -1
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const level = r[0].length
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// Find next same-level or higher-level header's index
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let j = i + 1
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for (; j < lines.length; j++)
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{
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const r = re.hashes.find(lines[j])
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if (r && r[0].length <= level) break
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}
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return j
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}
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/**
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* Hide an entire hn section
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* Example:
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*
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* ### Header3 <!--{ hideSection() }-->
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*
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* ... Hidden items
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*
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* ### Next Header3
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*/
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function hideSection()
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{
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const e = findSectionEnd()
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if (e != -1) lines.splice(i, e - i)
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i--
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}
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function hideLines(n: number)
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{
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lines.splice(i, n)
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i--
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}
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/**
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* Add something
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* @param s String
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*/
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function add(s: string)
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{
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lines[i] = lines[i].replace(re.command, s)
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}
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/**
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* Collapse section
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*/
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function collapseSection()
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{
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const e = findSectionEnd()
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const title = lines[i].substring(lines[i].indexOf(' ') + 1).replace(re.command, '')
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lines[i] = `<Collapse title="${encodeURIComponent(title)}">`
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lines.splice(e, 0, '</Collapse>\n')
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}
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// Run all commands in markdown
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while (i < lines.length)
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{
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console.log(`Line ${i}`)
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// Find commands
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const r = re.command.find(lines[i])
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if (r)
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{
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let cmd = r[0]
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cmd = cmd.substring(5, cmd.length - 5).trim()
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// Run cmd
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console.log(`Running command`, cmd)
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eval(cmd)
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}
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i++;
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}
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// If I don't call these functions somewhere, they will be deleted by vite build, and it will
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// raise an error when the functions are called in eval(). So I put function calls in an
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// impossible condition to prevent deletion.
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if (raw == 'STOP DELETING MY UNUSED FUNCTIONS!!!')
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{
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hideSection()
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hideLines(0)
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add('')
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collapseSection()
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}
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console.log(lines.join('\n'))
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return lines.join('\n')
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}
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